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AM6422: AM64x PRU_ICSSG Ethernet Througput

Thomas Yang55737
Expert 5156 points
Part Number: AM6422

Hi Team,

What is the command and test bench on test PRU_ICSSG Ethernet throughput?

The ICSSG UDP Egress throughput is only 94.21Mbps,

While CPSW UDP Egress is as expected as 914Mbps

Could you clarify?

-Thomas

  • 0
    TI__Guru** 101700 points

    Hello Thomas,

    The commands to test the UDP throughput should be thoroughly documented here: https://software-dl.ti.com/processor-sdk-linux/esd/AM64X/08_04_01_04/exports/docs/devices/AM64X/RT_Linux_Performance_Guide.html#ethernet

    I agree that less than 100Mbit throughput does not make sense if the PRU_ICSSG Ethernet was tested on a gigabit link. Do you have an EVM to run tests? If not I can try it out later this week.

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    TI__Expert 5156 points

    Hi Nick,

    We used iperf to test AM64x PRU ICSSG Ethernet TCP is 800~900Mbps, and UDP 400M(%0 loss)~600M(<1% loss), but Linux SDK doc show PRU ICSSG performance is much poor (90Mbps), please help clarify to avoid customer confuse.

    -Thomas

  • 0 in reply to Thomas Yang55737
    TI__Guru** 101700 points

    Hello Thomas,

    I see similar results using netperf (reported throughput of 720 Mbits for UDP egress tests). I'll file a ticket against the documentation and double-check on the testing methodology.

    root@am64xx-evm:~# ifconfig eth2 down
[  159.611999] icssg-prueth icssg1-eth eth2: Link is Down
[  159.623599] remoteproc remoteproc13: stopped remote processor 3008a000.txpru
[  159.630865] remoteproc remoteproc12: stopped remote processor 30084000.rtu
[  159.638909] remoteproc remoteproc11: stopped remote processor 300b4000.pru
[  159.647210] net eth2: stopped
root@am64xx-evm:~# ifconfig eth2 192.168.1.167
...
root@am64xx-evm:~# [  176.104359] icssg-prueth icssg1-eth eth2: Link is Up - 1Gbps/Full - flow
control off
[  176.112163] IPv6: ADDRCONF(NETDEV_CHANGE): eth2: link becomes ready

root@am64xx-evm:~# netperf -H 192.168.1.100 -j -c -l 60 -t UDP_STREAM -- -m 1470 -k DIRECTION,T
HROUGHPUT,MEAN_LATENCY,LOCAL_CPU_UTIL,REMOTE_CPU_UTIL,LOCAL_BYTES_SENT,REMOTE_BYTES_RECVD,LOCAL
_SEND_SIZE
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.1.100 () port 0 AF_IN
ET : histogram : interval
DIRECTION=Send
THROUGHPUT=720.60
MEAN_LATENCY=16.03
LOCAL_CPU_UTIL=62.44
REMOTE_CPU_UTIL=-1.00
LOCAL_BYTES_SENT=5404575540
REMOTE_BYTES_RECVD=5404575540
LOCAL_SEND_SIZE=1470

    Thanks for reporting,

    Nick